Door-knob fastening.



M. MCDONALD.

noon KNOB FASTENING.

APPLICATION FILED NOV. 5,

Patented Feb. 16,1915) MAR-T1131 MCDONALD. OF 'WASHINGTON, DISTRICT OF COLUMBIA.

DOOR-KNOB FASTENING.

Specification of Letters Patent.

Patented Feb. 16, 1915.

Application filed Novcmbcr. 5. 1914. Serial No. 870,471.

Ikall ii /mm if may concern lie it known that I, .dAn'riN Mcnoienp. a c izen of the United States, residing at Washington. in the District of Polmnhia. have invented certain new and useful Tmproveme ts in llvordx'nob Fasteningzs. of which the following is a specification.

This in ention relates to door knobs. and has for its'objeet to provide improved means for fastening the knob to its spindle. where by the knob and spindle maybe conveniently assembled, and the knob may be ad-- justed longitudinally of the spindle so as to accommodme the knob to doors of different thicknesses.

A further object of the inventionis to have the fastening entirely housed within the shank of the knob, thereby to insure the positive securing of the knob on the spindle.

A still further object of the invention is to provide for access to the fastening means I so so as to permitv of the convenient removal of the knob.

WVith these and other objectsin view, the present invention consists in the combination and arrangement of parts, as will be.

hereinafter more fully described, shown in the accompanyingdrawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size and minor details may be ina-de, Within the scope of theclaims 'wi thout departing from the SD'llt or sacrificing any of the advantages or the invention. [35

In the drawings,-Figure 1 is av lo gitudinal sectional iew taken through a door 5 knob and the adjacent end port on of a spindte' having my invention applied thereto.

Fig. 2v is an enlarged crosssectional view on the line 22 of Fig. 1. Fig. 3 is a per spective View of one end of the spindle. File. 4 is a detail perspective View of the double dog or detent which is carried by thespi'ndl Like characters of reference designate corresponding parts in each of the figures of the drawing. v

As shown in the accompanying drawing. 1 designates a spindle. and 2 a knob of any commoner preferred form or construction. The spindle is rectangulairin crosssection.

.as usual, and the tubularshank 3 of the knob is provided with a rectangular here. as

shank. In carrying outmy invention T proi ale nsual to:receive-"the end portion of the accompanying; drawing is formed from a,

single piece of. spring metal which is bent intermediate of its ends into substantially U-shapc. and the end portion of each side or leg of the dog is bent back upon itself to form a ratchetlingcr 7, the extremity of which flares outwardly from the Ushapcd body or shank of the dog. The dog may be conveniently assembled with the spindle by placing the dogastraddle of the pin 6 and then turning the dog into the opening 4 in longitudii'ml alincmcnt therewith. The ratchet fillfIOlS 7 extend outwardly through the open sides of the slot l and slightly be yond the slotted faces of the spindle. ,Op posit-e faces of the rectangular bore of the knob shank are provided with ratchet teeth 8, which are engaged by the ratchet fingers '7 when the end of the spindle is received within the shank of the knob. the teeth being disposed so as to hold against theratchct fingers and prevent removal of the knob.

it will. of course, be understood that each cud of the spindle is provided with a dog,

and when the spindle has been placed in a door, the knobs may be very conveniently fitted to the respective ends of the spindle and adjusted thereon in accordance with the thickness of the door.

For convenience in removing the knob, the shank is provided with a pair of longitudinal slots 9 in opposite sides thereof and intersecting the toothed faces of the bore of the'shauk. wlurcby any suitable instrument may be thrust through the slots 9 so as to press the ratchet fingers away from the ratchet teeth and thus permit convenient withdrawal of the knob from the spindle.

it will be noted that so far as external a ppcarance concerned. there is little or no change in the knob and spindle. while at the same time the fastening is clfr. tually housed and protected within the shank of the knob. 'lhe knob may be very conveniently fitted to the pindle and adiustcd lengthwise thcrcon. and also may be conveniently removed. We of the knob is absolutely pre 

